Fluid-flow governor



Oct. 8, 1940. e. MILLS 2,217,129

FLUID-FLOW GbVERNOR Filed March 28, 1938 Ha. I.

Patented Oct. 8, 1940 UNITED STATES FLUID-FLOW GOVERNOR George Mills,Gordon, New South Wales,

Australia.

- Application Marcli28, 1938, Serial No. 198,588

In Australia July 14, 1937 2 Claims.

This invention relates to improved means for controlling automaticallythe flow of a fluid, such as gas, water, or the like, from a servicemain, pipe line, or similar source of supply to a delivery pipe, and hasbeen devised to lower the cost of production, maintenance, and renewal,and to produce governors which will function as regulators of fluidpressure and as pressure reducing valves.

My invention comprises a chamber provided with a flexible andapproximately impervious partition wall or diaphragm, a delivery passagein constant communication with said chamber, a V supply passage to thechamber and adapted to o be connected with a supply main or the likesource of supply, a slidable valve adapted to control discharge from thesupply passage to the chamber, links connected with the valve and theflexible wall, means for preventing chattering of the valve on its seat,the provision of a relatively large discharge aperture for the supplypassage, and means for detaching the operative parts of the governor asa whole from the connected supply and delivery pipes.

In the accompanying drawing which illustrates one form of the invention:

Fig. 1 is a part sectional side elevation of a governor;

Fig. 2 is a part sectional plan of the governor with the lid anddiaphragm removed and with portion of the casing broken away.

A chamber is formed by an upper part casing I0 and a lower part casingII which parts are adapted to be secured to each other by bolts throughcircular flanges l2 and I3 formed on the parts. The walls of the partcasing I l are extended to form an end extension M of the chamber andterminate in a flange l 5. A flexible wall or diaphragm l6, which isapproximately impervious to the fluids treated, has its fiat circularperipheral portion I! secured in gas-tight manner between the flanges l2and I3 and divides the chamber into separate upper and lowercompartments.

A casting l8, adapted to be detachably bolted to the flange I5, isformed with independent supply and delivery passages l9 andrespectively. The supply passage I9 is tapped at 2| to take a supplypipe from the source of supply and its discharge aperture is ofrelatively large diameter and is fitted with a bushing 22 provided witha valve seat 23. The delivery passage 20 is tapped at 24 to take adelivery pipe, which may be fitted with a tap or cock, and this passageis in direct constant communication with the interior of the lowercompartment of the chamber.

A central vertical stem 25'is secured to the diaphragm base by means ofrelatively stiff plates 26, 21 and projects upwardly into the uppercompartment where it may be provided with guides (not shown) of knownconstruction and also projects downwardly into the lower compartmentwhere it is forked and fitted with a transverse pin 28.

Metal links 29, 29 are carried loosely by the pin 28 and are pivoted onremovable pins 30, 30 positioned near the seat 23. A longitudinallyadjustable and longitudinally movable member 3| is loosely mounted onthe pin 23 and its other end contacts with the inner face of a cup 32formed centrally on the rear face of a valve frame 33.

The front face of the valve frame is fitted with a replaceable valveplate 34 which is adapted to co-operate with the valve seat 23. Thisframe is pressed against the member 3| by return springs 35, 35 whichare mounted about guide pins 36, 36 for the frame 33.

A port 31 may be provided for the upper compartment for connection withabreather valve (not shown), and a port 38 for the lower compartment forconnection with a relief valve (not shown).

A lid 39 adapted to be bolted to the upper part casing [0 permits anydesired load to be placed on plate 26 so that any desired maximumpressure may be formed within the lower compartment without change ofposition of the valve.

In operation, supply and delivery pipes having been fitted to thecasting l8 and the supply turned on, fluid from the supply passage l9enters the lower compartment of the chamber and passes directly to thedelivery passage and delivery pipe and at the same time tends to liftthe flexible wall or diaphragm l6 and effect partial closure of thevalve. Should the pressure from the supply passage increase thediaphragm is raised and by the consequent movement of the links 29 andmember 3| forces the valve towards its seat and thus reduces the supplyof fluid to the chamber. Reduction of pressure, in similar manner,permits the springs 35 and the weight of the diaphragm and of the linksto move the diaphragm downwards and thus open the valve.

The member 3| is positionedon the pin 28 in direct line with the centreof the valve so that pressure on the supply side of the valve istransmitted directly to the pin which is retained in position by thelinks 29. Chattering of the valve on the valve seat is thus eliminated.

I claim:

1. A fluid-flow governor comprising a casing containing a chamber andhaving an entrance port and an exit port, a flexible partition in saidchamber, a stem connected to said partition, a valve seat at saidentrance port, a valve movable to and from said seat, guide pins mountedon opposite sides of said seat, a plate carrying said valve slidable onsaid pins, springs on said pins urging said valve from said seat, linkspivtween-the bifurcations of said stem and conotally mounted at one endat each side of said seat and pivotally connected at their other end tosaid stem, and a member pivoted at one end .on said stem at the pivotalpoint of and between said links, diverging from the plane of said links,and bearing at its other end against said plate.

2. A fluid-flow governor comprising a casing containing a chamber andhaving an entrance port and an exit port, a flexible partition in saidchamber, a stem connected with and extending from said partition andhaving bifurcations therebeyond, a transverse pin carried by saidbifurcations, a valve seat at said entrance port, a valve movable to andfrom said seat, guide pins mounted on opposite sides of said seat, aplate carrying said'valve slidable on said pins, springs on said'pinsurging said valve from its seat, links pivotally mounted at one end ateach side of said seat and disposed at their other ends benected theretoby said transverse pin, and a member pivoted at one end on saidtransverse pin between said links, diverging from the plane of saidlinks, and bearing at its other end against saidplate.

GEORGE MILLS.

